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Three new o-hydroxy Schiff bases, L_1, L_2 and L_3, were derived from the 1:1 M condensation of substituted salicylaldehyde with tris base and were characterized by FT-IR, ~1H NMR and ~(13)C NMR spectroscopies. The crystal structure of L_1 was also determined by single-crystal X-ray analysis, and it exists as a zwitterionic form in the solid state, with the H atom of the phenol group being transferred to the imine N atom. It adopts an E-configuration about the central C=N double bond. In addition, the biological activity assay was carried out and the results show that the Schiff-base compounds have a diverse range of biological activities against the fungi tested, which suggests great potential applications in antifungal fields in the future.
Three new o-hydroxy Schiff bases, L_1, L_2 and L_3, were derived from the 1: 1 M condensation of substituted salicylaldehyde with tris base and were characterized by FT-IR, ~ 1H NMR and ~ (13) C NMR spectroscopies. crystal structure of L_1 was also determined by single-crystal X-ray analysis, and it exists as a zwitterionic form in the solid state, with the H atom of the phenol group being transferred to the imine N atom. It assumes an E-configuration about the central C = N double bond. In addition, the biological activity assay was carried out and the results show that the Schiff-base compounds have a diverse range of biological activities against the fungi tested, which suggests great potential applications in antifungal fields in the future